I believe that someone on here has done the K20/whatever 'duh swap into a Mk7.5 ST, but never heard of anyone doing a Zetec swap.
Even though it would co$t many times more than what our cars are worth, I still think that a naturally aspirated, ITB Mountune Rallycross Lights, or better yet (but even more yet ridiculously priced) all-out Millington swap would be quite cool!